EP2834488B1 - Elektrische heizung zur unterstützung der aktiven und passiven regeneration eines dieselpartikelfilters zur abgasreinigung von dieselmotoren - Google Patents

Elektrische heizung zur unterstützung der aktiven und passiven regeneration eines dieselpartikelfilters zur abgasreinigung von dieselmotoren Download PDF

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Publication number
EP2834488B1
EP2834488B1 EP13714727.8A EP13714727A EP2834488B1 EP 2834488 B1 EP2834488 B1 EP 2834488B1 EP 13714727 A EP13714727 A EP 13714727A EP 2834488 B1 EP2834488 B1 EP 2834488B1
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EP
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Prior art keywords
dpf
exhaust
heating
heating mode
electric heater
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EP13714727.8A
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English (en)
French (fr)
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EP2834488A1 (de
Inventor
Wenzhong Zhang
Mike BANGE
Scott BOEHMER
Magdi KHAIR
Tan JULIAN
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Watlow Electric Manufacturing Co
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Watlow Electric Manufacturing Co
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Priority to EP17158493.1A priority Critical patent/EP3192991B1/de
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/08—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • F01N2900/1404—Exhaust gas temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present disclosure relates to exhaust aftertreatment systems for diesel engines, and more particularly to electric heating and control to provide assisted heating in the exhaust aftertreatment systems.
  • Diesel engines have been used in a variety of applications such as locomotives, marines and engine-generators.
  • exhaust aftertreatment systems have been employed and generally include a Diesel Oxidation Catalyst (DOC), a Diesel Particulate Filter (DPF), and an SCR (Selective Catalytic Reduction of NOx) to treat the exhaust gas and to control emissions to atmosphere or the outside environment.
  • DOC Diesel Oxidation Catalyst
  • DPF Diesel Particulate Filter
  • SCR Selective Catalytic Reduction of NOx
  • One method of increasing the exhaust gas temperature is through injecting hydrocarbon upstream from a DOC either in the exhaust pipe or inside the cylinder during the exhaust stroke. This method increases fuel consumption and also changes composition of the exhaust gas. For example, when fuel injection is injected in the exhaust, NO 2 generation in the DOC is significantly reduced. NO 2 is an effective reagent for passive regeneration of DPF at much lower temperature range. Therefore, the reduced NO 2 generation adversely affects the passive regeneration of the DPF.
  • a heater control module according to claim 1 is provided.
  • a method according to claim 8 is provided.
  • the increased NO 2 generation facilitates passive regeneration of the DPF.
  • the exhaust temperature gradient is reduced by providing more heat proximate a wall of an exhaust conduit and less heat proximate a center of the exhaust conduit.
  • the efficiency of the active regeneration of the DPF can be required heat for active regeneration of DPF can be increased due to more efficient burning of PM at the peripheral channels of the DPF.
  • an engine system 10 generally includes a diesel engine 12, a generator 14, a turbocharger 16, and an exhaust aftertreatment system 18.
  • the exhaust aftertreatment system 18 is disposed downstream from a turbocharger 16 for treating exhaust gases from the diesel engine 12 before the exhaust gases are released to atmosphere.
  • the exhaust aftertreatment system 18 includes a heating module 20, a DOC 22, DPF 24, and an SCR 26.
  • the heating module 20 includes an electric heater 28 disposed upstream from the DOC 22, and a heater control module 30 for controlling operation of the electric heater 28.
  • the exhaust aftertreament system 18 includes an upstream exhaust conduit 32 that receives the electric heater 28 therein, an intermediate exhaust conduit 34 in which the DOC 22 and DPF 24 are received, and a downstream exhaust conduit 36 in which the SCR is disposed.
  • the DOC 22 is disposed downstream from the electric heater 28 and serves as a catalyst to oxide carbon monoxide and any unburnt hydrocarbons in the exhaust gas. In addition, The DOC 22 converts harmful nitric oxide (NO) into nitrogen dioxide (NO 2 ).
  • the DPF 24 is disposed downstream from the DOC 22 to remove diesel particulate matter (PM) or soot from the exhaust gas.
  • the SCR 26 is disposed downstream from the DPF 24 and, with the aid of a catalyst, converts nitrogen oxides (NOx) into nitrogen (N 2 ) and water.
  • a urea water solution injector 27 is disposed downstream from the DPF 24 and upstream from the SCR 26 for injecting urea water solution into the stream of the exhaust gas.
  • the electric heater 28 provides assisted heating of the exhaust gas flowing in the exhaust conduits 32, 34, 36.
  • the generator 14 is connected to the diesel engine 12 to drive the diesel engine 12 during engine startup as an option and to supply electricity to the electric heater 34 during normal engine operation.
  • the heater control module 30 strategically controls the electric heater 28 in different heating modes to facilitate both active and passive regeneration of the DPF 24.
  • Regeneration is the process of burning and removing the accumulated particulates matters from the DPF 24. Regeneration can occur passively or actively. Passive regeneration can occur in normal engine operation when the temperature of the exhaust gas is sufficiently high. Active regeneration can occur based on a monitored DPF condition or based on a predetermined timing schedule by introducing very high heat to the exhaust aftertreatment system 10. Active regeneration can be achieved by proper engine control management to increase the exhaust temperature through late fuel injection or injection during the expansion stroke. Active regeneration can also be achieved through assisted heating by an electric heater. Active regeneration requires much more heat than passive regeneration and thus subjects the ceramic structure of the DPF 24 to the risk of cracking and decreases catalytic coating life time.
  • the heater control module 30 strategically controls operation of the electric heater 28 based on an engine load and a status of the DPF 24 to provide assisted heating in both active and passive regeneration of the DPF.
  • the heater control module 24 may be a part of an engine control unit (ECU) (not shown) or external to the ECU.
  • the ECU controls operation of the diesel engine 12, a fuel injection system (not shown), among others, and acquires and stores various parameters relating to engine operating conditions, including but not limited to, exhaust temperature, diesel engine load, flow conditions (air flow and air pressure etc.)
  • the heater control module 30 receives inputs from the ECU to make the proper determination how to operate the electric heater 28.
  • the control module could also receive information from stand alone after treatment control systems.
  • the heater control module 30 includes a heating mode determination module 62 and a heater operating module 63 including a passive regeneration heating module 64 and an active regeneration heating module 66.
  • the electric heater 22 can be operated in two operating modes: passive regeneration heating mode and active regeneration heating mode.
  • the heating mode determination module 62 determines a desired heating mode based on an engine load and the status of the DPF 24. When the DPF 24 is actively regenerated, the desired heating mode is the active regeneration heating mode. When the DPF 24 is not actively regenerated and the engine load is low, for example, at 10%, the desired heating mode is the passive regeneration heating mode.
  • the heating mode determination module 62 may include a heating strategy that specifies the correlation among the heating modes, duration, engine loads and the desired exhaust temperature rise. The heating mode determination module 62 also determines when the electric heater 28 should be turned on or off during normal engine operation. In response to the determination of the heating mode determination module 62, the heater operating module 63 operates the electric heater 28 accordingly.
  • the electric heater 28 is controlled to heat the exhaust gas to a predetermined temperature which allows for optimum NO 2 generation in the DOC 22.
  • NO 2 is an effective reactant for passive regeneration of DPF 24. Increasing NO 2 generation can facilitate passive regeneration of DPF 24.
  • the electric heater 28 is controlled to heat the exhaust gas differently to reduce exhaust temperature gradient across the exhaust conduits. When the temperature gradient is reduced, the active regeneration can be accomplished more efficiently.
  • the passive regeneration heating module 64 When the heating mode determination module 62 determines that the passive heating mode is desired, the passive regeneration heating module 64 then controls the electric heater 28 to heat the exhaust gas to a predetermined temperature.
  • the passive regeneration heating module 64 calculates and determines the desired temperature rise based on an exhaust temperature and the predetermined temperature.
  • the exhaust temperature may be obtained from the input from the ECU, temperature sensors.
  • the predetermined temperature depends on the properties of the catalysts in the DOC 14 and is set to allow for optimum NO 2 generation.
  • the NO 2 concentration at the outlet of the DOC 14 is dependent on the temperature of the exhaust gas.
  • the NO 2 concentration is relatively high when the catalyst temperature is in the range of 300 to 460°C, particularly in the range from 320 to 380°C. Therefore, the predetermined temperature is set to be in the range of 300 to 460°C, and preferably in the range from 320 to 380°C.
  • the electric heater 28 heats exhaust gas to the predetermined temperature, an optimum amount of NO 2 is generated to facilitate passive regeneration of the DPF 24.
  • the particulate matter is accumulated on the DPF at a lower rate, thereby reducing the frequency for active regeneration. As a result, the likelihood of DPF ceramic cracking and degradation of the catalysts due to high heat associated with active regeneration (generally in the range of 500 to 650°C) are reduced.
  • the desired heating mode is the active regeneration heating mode.
  • the active regeneration heating module 66 controls the electric heater 28 to provide differential heating to the exhaust gas.
  • the electrical heater 22 generates more heat along the periphery of the electric heater and less heat at the center of the exhaust conduit.
  • the exhaust conduit generally has a relatively higher temperature along the central axis of the conduit and a relatively lower temperature proximate the conduit wall.
  • the exhaust gas proximate the exhaust conduit wall also needs to be heated to the desired active regeneration temperature. Due to the temperature gradient across the cross section of the exhaust conduit, the exhaust gas proximate the center of the exhaust conduit is unnecessarily overheated, subjecting the center portion of the DPF 24 to higher heat and higher risk of cracks.
  • By operating the electric heater 28 to reduce the temperature gradient less heat is required to heat the exhaust gas to the desired active regeneration temperature. Therefore, the likelihood of overheating at the center of the DPF and the accompanying problems is reduced.
  • an exemplary embodiment of the electric heater 28 is shown to have a low watt density zone 40 proximate the center and a high watt density zone 42 along the periphery of the electric heater 28.
  • the electric heater 28 can provide differential heating across the exhaust conduit.
  • the electric heater 28 is powered by the generator 32.
  • the generator 32 drives the diesel engine 30 during engine startup. After the diesel engine 30 starts to operate on its own, the generator 30 is driven by the diesel engine 30 to generate electricity to power other electronics or electrical devices.
  • the heating strategy allows for use of available electricity generating capacity when it is not needed to power the other electrical and electronic systems during low engine load operation.
  • the heating mode determination module 32 includes a heating strategy which specifies the correlations among the heating modes, the exhaust temperature rise, the engine loads. As shown in the exemplary diagram, when the engine load is low and the DPF backpressure is in the range of medium to high, the target exhaust temperature rise (delta) would be low and the electric heater 28 is operated in the passive regeneration mode. For example, the electric heater 22 is in the passive regeneration heating mode when the diesel engine 30 is operating near low load conditions such as 10% load. The electric heater 22 demands less electric power from the generator 32 because the desired temperature rise (delta) is less than that for active regeneration and because less exhaust gas is generated from the diesel engine 30 due to the low engine load.
  • the electric heater 22 is turned off. Active regeneration of DPF may be initiated when the engine load is low or according to a predetermined schedule to benefit from heating lower exhaust mass flow.
  • the electric heater is turned on and operated in the active regeneration heating mode to provide differential heating.
  • the electric heater 28 is turned off.
  • the table illustrates the exhaust contents for different load conditions.
  • the exhaust gas exhibits the lowest exhaust flow (1925 cfm) and the highest available specific NOx (6.8 g/bhp-hr) among the 5 load conditions for a gen-set type of large diesel engine.
  • the DOC downstream of the heater will generate maximum amount of NO 2 due to higher available NOx under this load engine condition.
  • NO 2 passively oxidizes the particulate matter loaded DPF downstream of the DOC at its maximum rate.
  • the delta T rise is only 85°C which will minimize energy consumption in comparison with an active regeneration which will have a delta T as high as 350°C.
  • notch 1 condition on a GE locomotive engine with a flow of 54.8 kg/min it will require 73 KW energy input to heat the exhaust and have a temperature rise (delta) of 76°C up to 355 °C. It will need 315 KW to heat the exhaust up to 607 °C at the same notch 1 condition.
  • the electric heating strategy of the present disclosure may replace the fuel-injection-based active regeneration.
  • the heating module 20 of the present disclosure applies to all diesel engines which can generate electricity while in operation, preferably to those non-EGR diesel engines having high engine-out NOx at lower duty cycles. As shown, the heating module 20 can be applied to a catalyzed DPF only exhaust system, as well as an exhaust aftertreatment system 50 that includes DOC 52 and DPF 54 without SCR.
  • the heating module 20 of the present disclosure has at least the following benefits:
  • the present disclosure may include methods of heating portions of the gas flow in a more indirect matter.
  • the system could sense cooler portions within the gas flow cross section and provide heat where needed to provide a more even temperature distribution and compensate for heat losses.
  • the system may regenerate in certain sections or zones at different times.
  • These alternate forms of the present disclosure would also have a corresponding heater type that supports zone heating across the cross-section of gas flow, such as, by way of example, layered heaters or modular heat trace heaters such as those disclosed in pending U.S. application serial number 11/238,747 titled "Modular Layered Heater System” and in U.S. Patent No. 7,626,146 titled “Modular Heater Systems,”.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Claims (13)

  1. Heizungssteuerungsmodul (30) zum Steuern einer elektrischen Heizung (28) in einem Abgasnachbehandlungssystem (18), das einen Dieseloxidationskatalysator (DOC) (22) und einen Dieselpartikelfilter (DPF) (24) enthält, wobei das Heizungssteuerungsmodul (30) umfasst:
    ein Heizmodus-Bestimmungsmodul (62), das konfiguriert ist, um einen gewünschten Heizmodus aus einer Vielzahl von Heizmodi basierend auf einer Motorlast und einem Status des DPF (24) auszuwählen; und
    ein Heizungsbedienungsmodul (63), das konfiguriert ist, um die elektrische Heizung (28) basierend auf dem gewünschten Heizmodus zu bedienen,
    dadurch gekennzeichnet, dass die Vielzahl von Heizmodi einen passiven Regenerationsheizmodus und einen aktiven Regenerationsheizmodus enthalten, wobei die die elektrische Heizung (28) im passiven Regenerationsheizmodus bedient wird, um das Abgas auf eine vorbestimmte Temperatur zu erhitzen, um die NO2-Regeneration zu erhöhen, wenn der DPF (24) nicht aktiv regeneriert wird, und die elektrische Heizung (28) im aktiven Regenerationsheizmodus bedient wird, um differenziertes Heizen bereitzustellen, wenn der DPF (24) aktiv regeneriert wird.
  2. Heizungssteuerungsmodul (30) nach Anspruch 1, wobei die elektrische Heizung (28) im aktiven Regenerationsheizmodus bedient wird, um einen Temperaturgradienten quer durch eine Abgasleitung (32) zu senken.
  3. Heizungssteuerungsmodul (30) nach Anspruch 1 oder Anspruch 2, wobei die elektrische Heizung (28) im passiven Regenerationsheizmodus bedient wird, wenn die Motorlast niedrig ist.
  4. Heizungssteuerungsmodul (30) nach irgendeinem der vorhergehenden Ansprüche, wobei die Motorlast etwa 10% beträgt.
  5. Heizungssteuerungsmodul (30) nach irgendeinem der vorhergehenden Ansprüche, wobei die vorbestimmte Temperatur von den Eigenschaften von Katalysatoren im DOC (22) abhängt.
  6. Heizungssteuerungsmodul (30) nach irgendeinem der vorhergehenden Ansprüche, wobei die vorbestimmte Temperatur in einem Bereich von 300 bis 460°C liegt.
  7. Heizungssteuerungsmodul (30) nach irgendeinem der vorhergehenden Ansprüche, wobei die vorbestimmte Temperatur in einem Bereich von 320 bis 380°C liegt.
  8. Verfahren zum Erhitzen eines Abgases in einem Abgasnachbehandlungssystem (18), das einen Dieseloxidationskatalysator (DOC) (22) und einen Dieselpartikelfilter (DPF) (24) enthält, dadurch gekennzeichnet, dass das Verfahren umfasst:
    Erhitzen eines Abgases auf eine vorbestimmte Temperatur, wenn der DPF (24) nicht aktiv regeneriert wird; und
    Erhitzen des Abgases, zum Senken eines Abgastemperaturgradienten, wenn der DPF (24) aktiv regeneriert wird.
  9. Verfahren nach Anspruch 8, wobei die vorbestimmte Temperatur von den Eigenschaften des DOC (22) abhängt.
  10. Verfahren nach Anspruch 8 oder Anspruch 9, darüber hinaus das Erhöhen der NO2-Konzentration an einem Ausgang des DOC (22) umfassend, wenn der DPF (24) nicht aktiv regeneriert wird.
  11. Verfahren nach irgendeinem der Ansprüche 9 bis 10, wobei die vorbestimmte Temperatur in einem Bereich von 300 bis 460°C liegt.
  12. Verfahren nach irgendeinem der Ansprüche 9 bis 12, wobei die vorbestimmte Temperatur in einem Bereich von 320 bis 380°C liegt.
  13. Verfahren nach irgendeinem der Ansprüche 9 bis 12, darüber hinaus die Bereitstellung von mehr Wärme in der Nähe einer Wand einer Abgasleitung (32) und weniger Wärme in der Nähe einer Mitte der Abgasleitung (32) umfassend, um den Abgastemperaturgradienten zu senken.
EP13714727.8A 2012-02-22 2013-02-21 Elektrische heizung zur unterstützung der aktiven und passiven regeneration eines dieselpartikelfilters zur abgasreinigung von dieselmotoren Active EP2834488B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17158493.1A EP3192991B1 (de) 2012-02-22 2013-02-21 Methode zum aufheizen von abgasen in einem abgasnachbehandlungssystem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261601923P 2012-02-22 2012-02-22
PCT/US2013/027142 WO2013126575A1 (en) 2012-02-22 2013-02-21 Electric heating assisted passive and active regeneration for efficient emission controls of diesel engines

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP17158493.1A Division EP3192991B1 (de) 2012-02-22 2013-02-21 Methode zum aufheizen von abgasen in einem abgasnachbehandlungssystem
EP17158493.1A Division-Into EP3192991B1 (de) 2012-02-22 2013-02-21 Methode zum aufheizen von abgasen in einem abgasnachbehandlungssystem

Publications (2)

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EP2834488A1 EP2834488A1 (de) 2015-02-11
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US9708945B2 (en) 2017-07-18
US20180313244A1 (en) 2018-11-01
US20150337703A1 (en) 2015-11-26
CA2865165A1 (en) 2013-08-29
WO2013126575A1 (en) 2013-08-29
US9115616B2 (en) 2015-08-25
JP2017020510A (ja) 2017-01-26
US20130213010A1 (en) 2013-08-22
CA2865165C (en) 2016-08-09
US10036292B2 (en) 2018-07-31
EP2834488A1 (de) 2015-02-11
ES2737849T3 (es) 2020-01-16
US10669907B2 (en) 2020-06-02
EP3192991B1 (de) 2019-04-24
ES2638605T3 (es) 2017-10-23
JP6018646B2 (ja) 2016-11-02
EP3192991A1 (de) 2017-07-19
JP2015512011A (ja) 2015-04-23
US20170254239A1 (en) 2017-09-07
JP6335995B2 (ja) 2018-05-30

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